Influence of CaF2 in calcium aluminate-based slag on the degradation of magnesia refractory
- Authors
- Han, Jin Sung; Kang, Jin Gyu; Shin, Jae Hong; Chung, Yongsug; Park, Joo Hyun
- Issue Date
- Aug-2018
- Publisher
- Pergamon Press Ltd.
- Keywords
- Slag; Fluorspar; Degradation; Magnesia refractory; Viscosity; Penetration
- Citation
- Ceramics International, v.44, no.11, pp.13197 - 13204
- Indexed
- SCIE
SCOPUS
- Journal Title
- Ceramics International
- Volume
- 44
- Number
- 11
- Start Page
- 13197
- End Page
- 13204
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/5709
- DOI
- 10.1016/j.ceramint.2018.04.145
- ISSN
- 0272-8842
- Abstract
- High temperature experiments were carried out using an induction furnace to simulate the refractory-slag-metal reactions in conjunction with thermodynamic computations using FactSage7.0 software. The Al-killed steel and the CaO-Al2O3-8SiO(2)-5MgO-xCaF(2) (CaO/Al2O3 = 1.9, x = 0-15 wt%) slag were brought to equilibrium in a magnesia refractory at 1823 K. Moreover, the solubility of MgO in the slag was quantitatively measured using a resistance furnace as a function of CaF2 content and temperature to confirm the thermodynamic driving force of the dissolution of MgO. The penetration depth of a slag into the magnesia refractory increased with increasing CaF2 content, which originated from a decrease in slag viscosity. Also, it was confirmed that MgO grains were dynamically detached from the slag/refractory interface by increasing the content of CaF2.
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